Grade 11 : Biology - Neural and Neural Control (Set 5)

Question 1

What is the basic structural and functional unit of the neural system in animals?

Accepted Answer

B) Neuron

Answer

A) Nephron

Answer

C) Neuroglia

Answer

D) Myocyte

Question 2

Which type of neuron, possessing cell body with one axon only, is typically found in the embryonic stage?

Accepted Answer

C) Unipolar neuron

Answer

A) Bipolar neuron

Answer

B) Multipolar neuron

Answer

D) Pseudounipolar neuron

Question 3

In a resting neuron (unstimulated state), the axonal membrane is significantly more permeable to which of the following ions?

Accepted Answer

B) Potassium ions ($K^+$)

Answer

A) Sodium ions ($Na^+$)

Answer

C) Calcium ions ($Ca^{2+}$)

Answer

D) Chloride ions ($Cl^-$)

Question 4

The active transport of ions across the axonal membrane by the $Na^+ / K^+$ pump transports:

Accepted Answer

A) $3\ Na^+$ outwards for $2\ K^+$ into the cell

Answer

B) $2\ Na^+$ outwards for $3\ K^+$ into the cell

Answer

C) $3\ Na^+$ into the cell for $2\ K^+$ outwards

Answer

D) $2\ Na^+$ into the cell for $3\ K^+$ outwards

Question 5

What are the gaps between two adjacent myelin sheaths along a myelinated nerve fiber called?

Accepted Answer

B) Nodes of Ranvier

Answer

A) Synaptic clefts

Answer

C) Axon hillocks

Answer

D) Schwann gaps

Question 6

At a chemical synapse, the influx of which ions into the axon terminal triggers the release of neurotransmitters into the synaptic cleft?

Accepted Answer

C) $Ca^{2+}$

Answer

A) $Na^+$

Answer

B) $K^+$

Answer

D) $Mg^{2+}$

Question 7

Which region of the forebrain contains major centers for controlling body temperature, urge for eating, and drinking?

Accepted Answer

B) Hypothalamus

Answer

A) Thalamus

Answer

C) Cerebellum

Answer

D) Medulla oblongata

Question 8

The canal passing through the midbrain that connects the third and fourth cerebral ventricles is called the:

Accepted Answer

B) Cerebral aqueduct

Answer

A) Corpus callosum

Answer

C) Canal of Schlemm

Answer

D) Eustachian tube

Question 9

Which hindbrain structure contains centers that control respiration, cardiovascular reflexes, and gastric secretions?

Accepted Answer

C) Medulla oblongata

Answer

A) Pons

Answer

B) Cerebellum

Answer

D) Thalamus

Question 10

The large tract of nerve fibers connecting the left and right cerebral hemispheres is called the:

Accepted Answer

A) Corpus callosum

Answer

B) Corpora quadrigemina

Answer

C) Arbor vitae

Answer

D) Fovea centralis

Question 11

What is the correct flow pathway of signals during a simple reflex action?

Accepted Answer

B) Receptor $\rightarrow$ Afferent neuron $
ightarrow$ Interneuron/CNS $
ightarrowEfferent neuron
ightarrow$ Effector

Answer

A) Effector $\rightarrow$ Efferent neuron $
ightarrowInterneuron
ightarrowAfferent neuron
ightarrow$ Receptor

Answer

C) Receptor $\rightarrow$ Efferent neuron $
ightarrowCNS
ightarrowAfferent neuron
ightarrow$ Effector

Answer

D) Afferent neuron $
ightarrowReceptor
ightarrowCNS
ightarrowEffector
ightarrow$ Efferent neuron

Question 12

Which layer of cranial meninges is innermost, very thin, highly vascular, and remains in intimate contact with brain tissue?

Accepted Answer

C) Pia mater

Answer

A) Dura mater

Answer

B) Arachnoid mater

Answer

D) Sclera

Question 13

Photoreceptor cells known as 'cones' are primarily responsible for:

Accepted Answer

B) Daylight (photopic) vision and color vision

Answer

A) Twilight (scotopic) vision

Answer

C) Auditory signal transmission

Answer

D) Olfactory perception

Question 14

The central point of the human retina where visual acuity (resolving power) is at its maximum is the:

Accepted Answer

C) Fovea centralis

Answer

A) Blind spot

Answer

B) Optic disc

Answer

D) Cornea

Question 15

Arrange the ear ossicles in order from the tympanic membrane (eardrum) to the oval window:

Accepted Answer

B) Malleus $\rightarrow$ Incus $\rightarrow$ Stapes

Answer

A) Incus $\rightarrow$ Malleus $\rightarrow$ Stapes

Answer

C) Stapes $\rightarrow$ Incus $\rightarrow$ Malleus

Answer

D) Malleus $\rightarrow$ Stapes $\rightarrow$ Incus

Question 16

Which anatomical tube connects the middle ear cavity with the pharynx to equalize air pressure across the tympanic membrane?

Accepted Answer

C) Eustachian tube

Answer

A) Cochlear duct

Answer

B) Semicircular canal

Answer

D) External auditory meatus

Question 17

The organ of Corti, containing auditory hair cells that act as hearing receptors, is situated on the:

Accepted Answer

C) Basilar membrane

Answer

A) Reissner's membrane

Answer

B) Tectorial membrane

Answer

D) Tympanic membrane

Question 18

Which component of the inner ear acts specifically as the sensory receptor for dynamic balance during rotational movements of the head?

Accepted Answer

B) Crista ampullaris

Answer

A) Organ of Corti

Answer

C) Macula of saccule

Answer

D) Otolith matrix

Question 19

The fluid filling the interior space of the membranous labyrinth (such as scala media) is called:

Accepted Answer

B) Endolymph

Answer

A) Perilymph

Answer

C) Hemolymph

Answer

D) Cerebrospinal fluid

Question 20

The inner parts of cerebral hemispheres and associated deep structures like amygdala and hippocampus form a complex involved in emotional behavior called the:

Accepted Answer

B) Limbic system

Answer

A) Reticular activating system

Answer

C) Basal ganglia

Answer

D) Corpora quadrigemina

Grade 11 : Biology - Neural and Neural Control (Set 5)